The Negroes in Negroland, the Negroes in America, and Negroes Generally; Also, the Several Races of White Men, Considered as the Involuntary and Predestined Supplanters of the Black Races (New York: G. W. Carleton; London: S. Low, Son, and Co., 1868), by Hinton Rowan Helper

A Vindication of the Capacity of the Negro Race for Self-government, and Civilized Progress, As Demonstrated By Historical Events of the Haytian Revolution, and the Subsequent Acts of That People Since Their National Independence (New Haven, CT: W. H. Stanley, printer, 1857), by James Theodore Holly